when pregnant, where does the baby's urine & poop go & what happens to it?

It is normal for a fetus to urinate in the womb. This process usually starts at the end of the first trimester, and the urine goes into the amniotic fluid, where it is later swallowed by the fetus. While a fetus can defecate in the womb, it only happens in 12% of cases. The fetus accumulates meconium in the intestines, and it normally isn't passed until the baby is born.

Updated on Thursday, February 02 2012 at 07:29AM EST
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